Tractor scoop



' I 1, 22,08 March 22 1927. s. W; BRIGGS 6 3 TRACTOR SCOOP Filed Jan. 19, 1926 4 Sheets-Sheet 1 March 22 1927. 1,622,)83

S. w. BRIGGS TRACTOR scobP Filed Jan. 19, 1926 4 Sheets-Sheet 2' (III 31 m i 7m 4 s. w. BRIGGS TRACTOR SCOOP March 22 if W March 22 1927.,

s. w. BRIGGS v I TRACTOR SCOOP Filed Jan. 19, 1.92

4 Sheets-Sheet 4 Fatented Mar. 22, 1927.-

UNITED. srArEs SOUTHWIOK W. BRIGGS, F GLEN'MONT, MARYLAND.

raae'roa scoort Application filed January 19, 1926. Serial no. 82,886.

The present invention relates to tractor scoops, and more particularly to that type wherein the scraper pan is operated and controlled by fluid pressure.

An ob ect of the present invention is to provide a construction wherein a single cylinder is employed for operating the pan not only to fill the same, but also to raise and carry the load and further to operate the pan for dumping the load.

Another object of the invention is to provide an improved construction of relatively simple form wherein a single flexible connector is utilized between the cylinder means 1 and the pan and connected between the same in such manner as to effect the various de sired raising and lowering. of the opposite ends of the pan for filling, carrying and dumping the same. v,

A further object of the invention is to provide an improved control for regulating the introduction and withdrawal of the fluid from the cylinder, and which is actuated from a tractor.

The invention still further aims at the provision of an improved fluid circuit capable of mounting upon a tractor and connected to the usual mechanism of the tractor, so as to maintain a copstant fluid 0 current at all times in condition for use in actuating the cylinder and which may be maintained in circulation when the cyl inder is released or is not in operation with out disturbing the function between" the 35 fluid current device and the tractor.

With the foregoing and other objects in view, the invention will be more .fully described hereinafter, and will be more particularly pointed out in the claims appended hereto.

In the drawings, wherein like symbols referto like or corresponding parts throughout the several views,

Figure 1 is aside elevation of a tractor scoop constructed according to the present invention.

Figure 2 is a fragmentary enlarged section taken on the line 2--2 of Figure 1 and showing the forwardscoop pan connection and the stop means for limiting the upward movement thereof. v x V .Figure 3 is a transverse section through the rear end of the tractor scoop taken on the line 33 of Figure 1.

Figure 4 is a top plan view of the tractor scoop as connected to atractor and showing the fluid circuit means connected to the tractor. a l

Figure 5 1s an enlarged side elevation of the fluid circuit means as applied to a co tractor. V

Figure 6 is a fragmentary top plan view of the pump connection between the fluid circuit means and the tractor.

Figure 7 is a detail enlarged transverse section taken through the upper end of the fluid cylinder of the tractor scoop, on the line 7--7 of Figure 1. v

Figure 8 is a detail enlarged longitudinal section taken through the fluid cylinder, and

Figure 9 is a detail enlarged sectional view of the fluid reservoir and adjacent connections for the fluid circuit means.

Referring to the drawings, 20 designates a frame ofwany suitable construction open intermediate its ends and across which is secured a rear axle 21 upon which ground wheels 22 are mounted to support the rear end of the frame. The forward end of the frame is provided with converging bars 23 supporting a clevis 24 carrying a bolt or pin 25 for detachable engagement with the coupling head 26 carried upon the rear end of a tractor 27.

Arrangedwithin the opening of the frame 20 is a scraper pan 28'open at its forward end and closed at its rear end and provided across its rear upper edge portion with a. supporting rod 29 projecting beyond the opposite sides of the scraper pan 28 and adapted to bear across the upper edges of the sides of the frame 20. The rear end "of the scraper pan 28 therefore cannot drop through the frame 20. The forward end of the scraper pan 28 isprovided with an" upwardly extendingbail or yoke 30, which carries a pulley bracket 31 in which a pulley 32 is mounted for raising and lowering the forward .end of the scraper pan 28.

A pair of upwardly converging frame 10o bars 33 is carried upon the rear end of the" frame 20 and the bars 33 are connected at their upper ends by a bracket plate 34 with an upwardly and rearwardly lncliued support 35 (if any suitable construction, but preferably comprising a pair of spaced angle bars with their flanges extending upwardly-t0 provide a support and guide connected to the forward end of the frame 20 at its lower end by a plate 36. The support 35 carries an elongated fluid cylinder 37 in its lower end portion while the support 35 is provided with a pulley bracket 38 upon its upper end in wh1ch is mounted a pulley 39 As shown in Figure 8 the cylinder 37 is closed atits lower end by a cap 40 and at its upper end is provided with a coupling head 41 'into one side of which is connected a fluid supply pipe 42. Theouter end of the coupling head 41 carries a stufling box 43 through which slides a piston rod 44 connected to a piston 45 operable in the cylinder 37. .Fluid is adapted to enter and leave the cylinder 37 through, the ipe 42.

T e piston rod 44. extends lengthwise from the cylinder 37 in the combined support and guide 35 and is connected at its outer end to a cable 46 or other suitable flexible means which is carried rearwardl and upwardly and over the pu1ley.39. The cable 46 extends downwardly and forwardly from the pulley 39 to a pulley 47 mounted in abracket 48 secured to the support 35 immediately over the forward end of the sore er pan 28, the cable 46 passing downwar ly from the pulley 47 and about the pulle' 32, whence the cable 46 is carried upward y to a pulley 49 mounted in a bracket 50 depending from the support 35 toward the rear end thereof. The cable 46 is carried downwardly from the pulley 49 to the rear end of the scraper pan 28 and is connected to the rod 29 thereof, or through any other suitable means.

Stop means 51, at present in the form of a pair of substantially horizontal rods, is secured at its forward end to the su port 35 near the lower end of the cylinder 3 and extends rearwardly to over-he the bail or yoke 30 of the scraper pan 28, a cross bar the rear end of the pan is elevated for the pur ose of dum ing the pan when desired. A c ain 54 may e connected by meansof a bolt 55 to the forward end of the frame 20 com brac and extends to the forward end of the pan 28 the chain 54 being branched or divided for this purpose and secured to the cars 56.

The means for controllin the cylinder 37 arises a fluid pump 5% mounted on a ct plate 58 detachably secured to the side of the tractor 26. The pump has a shaft 59 u on which a bevel pinion 60 is mounted w ieh meshes with a pinion gear '61 carried in the usual manner upon the power shaft 62 of the tractor, as shown in 7 detail in Figure 6.

. The pump 57 is connected at its inlet end by a pipe 63 Withi a reservoir or tank 64 adapted to contain a fluid such as an oil or the like, and the outlet lower end of the pump 57 is connected to a pi 65 which extends upwardly to the'top o the tank 64 and is returned across the upper end of the tank and rovided with a T-coupling' 66 from which leads a branch pipe 67 connected to an automatic pressure controlled valve 68 of any approved type. which in turn is connected to the ,upper end of the tank 64. 'The pipe 65 is provided, beyond.

the T-coupling 66.with a three-way valve 69 having a nipple .70 on one branch thereof which is connected to the-top of the tank 64 y while its other-branch carries a continuation of the pipe 65 to which is connected a flexible hose 71 of sufiicient length to extend from the tractor 27 to the lower end of the fluid suppl pipe 42. The ipe 42 is carried downward y at one side 0 the cylinder 37 to the forward end of the frame 20 near the clevis 24, the flexible pipe 71 permittin the free movements between the tractor and the scoop.

In operation, the ump 57 is driven by the tractor motor and aws fluid downwardly from the tank 64 and forces the fluid upwardly through the pipe 65. When the 'three-way valve 69 is closed to the inner end of the pipe 65, as shown in Figure 9, the fluid forced upwardlythrough the pipe65 enters the branch p1pe 67 and forces the valve 68 open to permit the flmd to pass back into the tank '64.

When, however, the valve 69 is adjusted to provide a through passage in the pipe 65 through the valve 69, the fluid is forced into the flexible pipe 71 and into the supply pipe 42 through which the fluid flows into the top of the cylinder 37. The piston 45 is thus forced downwardly in the cylinder and the cable 46 is drawn therewith to first lift the forward end of the scraper pan 28 untll the yoke or bail 30 strikes the stop 51, at which time the draft of the' cable 46 is transmitted through the pulley 32 to the rear end of the scraper pan elevating the same.

As the pulley 32 provides a reduction earing in the draft line, the forward end 0 the pan will be elevated without disturbing the position of the rear end of the pan because the latter requires a direct pull, while the forward end of the pan rises at one-half the speed of the road of travel of the cable 46 and consequently ofl'ers considerably less resistancetoelevation as compared with the 1,e22,oss

When it is desired to scrape up a load, the valve 69 is adjusted into the, position shown in Figure 9 wherein the fluid in the cylinder 37 travels backwardly through the flexible hose 71 and into the top of the tank 64. At this time the rear end of the scraper pan 28 is seated on the frame 20 and then the forward end of the scraper pan is permitted to swing down for contact with the ground, or below it as occasion may require to scrape up a load. As soon as the desired load has been placed in the scraper pan 28, fluid is admitted to the cylinder to first elevate the forward end of the pan. The outer end of the pipe may now be closed by swinging the valve 69 into a position opposite to that shown in Figure 9, so as to hold the load in the pan and maintain the pan in the carrying position shown in Figure 1.

. To dump the pan the valve 69 is adjusted to admit more fluid to the cylinder 37, so that the cable 46 will be further drawn and the rear end of the pan 28 will then be elevated above the frame 20 sufficiently to dump the load. During this time the forward end df the pan is held upwardly in a position defined by the stop 51.

it is obvious that various changes and modifications may be, made in the details of construction and design of the above specifically described embodiment of this invention without departing from the spirit thereof,

such chan es and modifications being re-' stricted on y by the scope of the following ,claims.

What is claimed is 1. In a tractor scoop, a pan, and a single hydraulic means connected to. the opposite ends of the pan for independently raising and lowerin the opposite ends of the pan for lillin and umping the same.

2. n a tractor scoop, a frame for attachment to a tractor, a scraper pan mounted in the frame, a sin 1e fluid operated cylinder mounted on the name, and a single flexible element connected between the opposite ends of the pan and said fluid operated element for independently raising and lowering the opposite ends of the pan to fill and dump the same.

3. In a tractor scoop, a frame for attachment to the tractor, a scraper pan suspended in the frame, a single fluid operated means mounted on the frame, a flexible connector connected at one end to said fluid operated means and at its other end, to the rear end of said scraper pan, and a speed reduction connection between an intermediate portion of said cable and the forward end of said determined height.

5. In a tractor scoop, a frame, a single cylinden on the frame, a scraper pan suspended in the frame, a flexible connector attached at one end to the cylinder and at its other end to the scraper pan, a speed reduction connection between the scraper pan and the intermediate portion of the flexible connector, and stop means on the frame to arrest the upward movement of one end of the scraper pan beyond a predetermined height.

6. In atractor scoop, a frame, a scraper pan in the frame, a single cylinder mounted on the frame and connected to the scrapper pan for operating the same, a fluid circuit means adapted to be mounted on the tractor, and valve means on=the tractor adjacent the fluid circuit means and cooperable with the fluid circuit means and with said cylinder for deflecting fluid. from the circuit means into the cylinder for operating the latter.

In testimony whereof I afiix ature.

m s1 SOUTHWICK W. it GGS. 

